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LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
Loud speaker path as below:
MSM7200A Line_OP,ON
Æ
C513, C514
Æ
IC501 (Audio Subsystem)
Æ
speaker PAD
Start
The sine wave appear
at C513, C514 ?
Change the Main board
NO
Connect the phone to network
Equipment and setup call
Setup 1KHz tone out
Set phone with speaker phone mode
or Play the multimedia contents
YES
Check IC501
NO
YES
Can you hear the tone?
Change the speaker
NO
YES
END
The sine wave appear at
pads of speaker?
4.10.3. Loud speaker path (voice speaker phone, Multimedia play)
0
R5
0
4
1
0
5
C
I
5
4
G
T
_
P
W
E
A
7
7
8
9
X
A
M
C4
D3
4
B
4
D
3
C
3
B
2
B
2
C
1
C
2
D
1
D
5
A
4
A
C5
B1
A3
VSS
VD
D
PVD
D
N
1
C
P
1
C
2
A
N
I
1
A
N
I
2
B
N
I
1
B
N
I
S
A
I
B
A
D
S
L
C
S
+
N
I
X
R
-
N
I
X
R
GN
D
PG
N
D
V
5
_
G
E
R
V
u
1
0
1
5
C
u
1
1
1
5
C
u
1
2
1
5
C
n
8
1
3
1
5
C
n
8
1
4
1
5
C
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0
2
2
5
1
5
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2
2
6
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5
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u
1
7
1
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V
6
.
2
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P
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1
4
4.7k
4.7k
R5
1
5
7
2
9
1
5
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7
2
1
3
5
R
N
O
_
E
N
I
L
P
O
_
E
N
I
L
A
D
S
_
C
2
I
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I
D
U
A
L
C
S
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C
2
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U
A
N
_
V
C
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P
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V
C
R
L
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H
P
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S
B
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S
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A
0
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1
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c
C
.
v
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t
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l
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D
1
0
5
N
C
2
1
p
3
3
1
9
5
C
p
3
3
2
9
5
C
C
8
.
6
B
S
R
P
1
9
5
D
C
8
.
6
B
S
R
P
2
9
5
D
n
8
6
9
9
5
L
n
8
6
8
9
5
L
N
_
R
K
P
S
P
_
R
K
P
S
8
0
6
1
8
0
6
1